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[[File:Logo Monografía.jpg|left|thumb|300px|Map: Reportered prevalence of hypertension in the population over 15 years. 2017. Spain. [ PDF]. [/ Data]. [//interactivo-atlasnacional.ign.es/index.php#c=indicator&i=r_123_t.r_123_t&s=Total&t=A02&view=map10 Versión interactiva. ]]]

Hypertension is an important risk factor that has been discovered in 19% of patients with COVID-19 in Spain. The biological concept is based on its effect on the renin-angiotensin-aldosterone system and on angiotensin-converting enzyme 2 (ACE-2) overexpression.

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[[File:Logo Monografía.jpg|left|thumb|300px|Map: Prevalence of obesity in the population over 18 years of age. 2017. Spain. [ PDF]. [/ Data]. [//interactivo-atlasnacional.ign.es/index.php#c=indicator&i=r_123_t.r_123_t&s=Total&t=A02&view=map10 Versión interactiva. ]]]

Obesity is considered the epidemic of the 21st century, as its numbers are increasing in the adult population and, what is more worrying, in children. Being overweight/obese has been identified in numerous studies as a predictor of hospital admission and admission to the ICU, especially in patients under 65 years of age. The SEMI-COVID-19 registry shows its presence in 21% of patients.